1101010091 has 2 divisors, whose sum is σ = 1101010092. Its totient is φ = 1101010090.

The previous prime is 1101010039. The next prime is 1101010111. The reversal of 1101010091 is 1900101011.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1101010091 - 2²² = 1096815787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101012091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550505045 + 550505046.

It is an arithmetic number, because the mean of its divisors is an integer number (550505046).

Almost surely, 2^1101010091 is an apocalyptic number.

1101010091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101010091 is an equidigital number, since it uses as much as digits as its factorization.

1101010091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 14.

The square root of 1101010091 is about 33181.4721041728. The cubic root of 1101010091 is about 1032.5959875350.

The spelling of 1101010091 in words is "one billion, one hundred one million, ten thousand, ninety-one".